Surname ทูม (Thum 
, ทูม 
, Tuhm) , across the world, is quite a common cognomen. The surname ทูม is characteristic of Singapore, where it is quite a rare surname, Malaysia, and Germany. Measured by absolute frequency, it is the most numerous in Germany, Malaysia, and the United States. Very seldom, ทูม is the forename as well as the last name.